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092bd54d69
The following three sysfs files are created to display according feature
set information of bcache:
/sys/fs/bcache/<cache set UUID>/internal/feature_compat
/sys/fs/bcache/<cache set UUID>/internal/feature_ro_compat
/sys/fs/bcache/<cache set UUID>/internal/feature_incompat
is added by this patch, to display feature sets information of the cache
set.
Now only an incompat feature 'large_bucket' added in bcache, the sysfs
file content is:
[large_bucket]
string large_bucket means the running bcache drive supports incompat
feature 'large_bucket', the wrapping [] means the 'large_bucket' feature
is currently enabled on this cache set.
This patch is ready to display compat and ro_compat features, in future
once bcache code implements such feature sets, the according feature
strings will be displayed in their sysfs files too.
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _BCACHE_FEATURES_H
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#define _BCACHE_FEATURES_H
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#include <linux/bcache.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#define BCH_FEATURE_COMPAT 0
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#define BCH_FEATURE_RO_COMPAT 1
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#define BCH_FEATURE_INCOMPAT 2
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#define BCH_FEATURE_TYPE_MASK 0x03
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/* Feature set definition */
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/* Incompat feature set */
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#define BCH_FEATURE_INCOMPAT_LARGE_BUCKET 0x0001 /* 32bit bucket size */
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#define BCH_FEATURE_COMPAT_SUUP 0
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#define BCH_FEATURE_RO_COMPAT_SUUP 0
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#define BCH_FEATURE_INCOMPAT_SUUP BCH_FEATURE_INCOMPAT_LARGE_BUCKET
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#define BCH_HAS_COMPAT_FEATURE(sb, mask) \
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((sb)->feature_compat & (mask))
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#define BCH_HAS_RO_COMPAT_FEATURE(sb, mask) \
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((sb)->feature_ro_compat & (mask))
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#define BCH_HAS_INCOMPAT_FEATURE(sb, mask) \
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((sb)->feature_incompat & (mask))
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#define BCH_FEATURE_COMPAT_FUNCS(name, flagname) \
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static inline int bch_has_feature_##name(struct cache_sb *sb) \
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{ \
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return (((sb)->feature_compat & \
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BCH##_FEATURE_COMPAT_##flagname) != 0); \
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} \
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static inline void bch_set_feature_##name(struct cache_sb *sb) \
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{ \
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(sb)->feature_compat |= \
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BCH##_FEATURE_COMPAT_##flagname; \
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} \
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static inline void bch_clear_feature_##name(struct cache_sb *sb) \
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{ \
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(sb)->feature_compat &= \
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~BCH##_FEATURE_COMPAT_##flagname; \
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}
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#define BCH_FEATURE_RO_COMPAT_FUNCS(name, flagname) \
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static inline int bch_has_feature_##name(struct cache_sb *sb) \
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{ \
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return (((sb)->feature_ro_compat & \
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BCH##_FEATURE_RO_COMPAT_##flagname) != 0); \
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} \
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static inline void bch_set_feature_##name(struct cache_sb *sb) \
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{ \
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(sb)->feature_ro_compat |= \
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BCH##_FEATURE_RO_COMPAT_##flagname; \
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} \
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static inline void bch_clear_feature_##name(struct cache_sb *sb) \
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{ \
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(sb)->feature_ro_compat &= \
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~BCH##_FEATURE_RO_COMPAT_##flagname; \
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}
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#define BCH_FEATURE_INCOMPAT_FUNCS(name, flagname) \
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static inline int bch_has_feature_##name(struct cache_sb *sb) \
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{ \
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return (((sb)->feature_incompat & \
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BCH##_FEATURE_INCOMPAT_##flagname) != 0); \
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} \
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static inline void bch_set_feature_##name(struct cache_sb *sb) \
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{ \
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(sb)->feature_incompat |= \
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BCH##_FEATURE_INCOMPAT_##flagname; \
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} \
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static inline void bch_clear_feature_##name(struct cache_sb *sb) \
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{ \
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(sb)->feature_incompat &= \
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~BCH##_FEATURE_INCOMPAT_##flagname; \
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}
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BCH_FEATURE_INCOMPAT_FUNCS(large_bucket, LARGE_BUCKET);
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int bch_print_cache_set_feature_compat(struct cache_set *c, char *buf, int size);
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int bch_print_cache_set_feature_ro_compat(struct cache_set *c, char *buf, int size);
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int bch_print_cache_set_feature_incompat(struct cache_set *c, char *buf, int size);
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#endif
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